/Engine/Plugins/FX/Niagara/Source/Niagara/Classes/NiagaraSimCache.h
Reads Niagara Color attributes by name from the cache frame and appends them into the OutValues array. EmitterName - If left blank will return the system simulation attributes.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category=NiagaraSimCache) void ReadColorAttribute ( [TArray](API\Runtime\Core\Containers\TArray)< [FLinearColor](API\Runtime\Core\Math\FLinearColor) > & OutValues, [FName](API\Runtime\Core\UObject\FName) AttributeName, [FName](API\Runtime\Core\UObject\FName) EmitterName, int FrameIndex ) const